托福真题答案解析

　　【Introduction】

　　加拿大一项新研究发现，患二型糖尿病的病人，若能同时做有氧及重量训练运动，将可显着地降低血糖。

　　　　【Section One】Article

　　It‘s no secret that exercise is key to controlling type 2 diabetes — and many doctors already urge their diabetic patients to get active. But it‘s a vague directive: How much exercise is enough? How often? And what kind? The simple answer is that any is better than none — in sum, that‘s what a new study published in the Sept. 18 issue of the journal Annals of Internal Medicine found. But it also found that not all exercise is created equal and that the combination of aerobic exercise and weight training is significantly better for controlling blood sugar than either alone.

　　The elegantly designed study, led by researchers at the University of Calgary and the University of Ottawa, involved 251 patients aged 39 to 70, with type 2 diabetes. The patients, none of whom were regular exercisers, were randomized to one of four groups: aerobic exercise, resistance training, a combination of both, or none. For 22 weeks, the aerobic group worked out for 45 minutes three times a week on the treadmill or stationary bicycle; the resistance-training group spent an equal amount of time on weight machines. The combination group was at the gym twice as long as the other two exercise groups, doing the full aerobic plus weight-training regimens. "We built up gradually to 45 minutes, but it‘s cert...

　　　【Introduction】

　　任何饮食习惯都无法违反热力学定律，即使现在充斥各种神奇的减重方法，减轻体重的唯一方法只有消耗的热量。但新的研究指出增加体重的身体位置可以提供线索来决定那种饮食习惯将最适合你。

　　　【Section One】Article

　　No diet has ever been able to defy the laws of thermodynamics. Whether you go low carb, low fat, low this or low that, the only way to lose weight is to burn more calories than you consume. Even the new "it" diet, volumetrics—which uses fancy terms such as energy density and satiety to describe why filling up on certain low-calorie, water-based foods like celery makes you less hungry—can‘t miraculously melt away fat. But new research indicates that where on your body you pack on extra kilograms may provide a clue to determining which diet will work best for you.

　　It is already widely accepted that even the most rigorously adhered-to diet will not produce the same results from person to person. Some of us are simply genetically predisposed to burn more calories more efficiently than others. Restricting those calories, as you do on a diet, will similarly lead to differing results. But the biggest wild card in the diet game may be how you crank out insulin.

　　As digestion breaks down much of what we eat into sugary, energy-rich fuel that helps keep us on the go, insulin triggers the body to store excess sugar floating around the bloodstream as fat. Insulin was particularly important in our caveman days, when we needed the energy from one meal to last...

　　　【 Introduction】

　　在不久的将来,癌症病人可能会根据他们基因而接受不同的治疗在刚结束的巴塞罗那癌症大会上,各国的科学家和医生都发表了关于治疗癌症最新成果.想了解关于癌症最新信息,就来阅读这篇科技报道吧

　　　【 Fast Reading 】

　　Genes Key to Future Cancer Cures

　　(BARCELONA, Spain) — The treatment that more cancer patients receive may one day depend on their genes.

　　With an increasing number of biological clues available, doctors hope they will be able to customize more patients’ treatments based on their genetic profiles .

　　In research presented at a meeting of the European Cancer Organization in Barcelona, experts said this week that these clues will help doctors determine not only which patients will probably develop cancer, but even those who will relapse , or be suitable for specific treatments.

　　"We are going to witness a revolution in cancer treatment," said Dr. Martine Piccart, head of medicine at the Institut Jules Bordet in Belgium. "In a few years, we will be able to fully demonstrate how powerful these new technologies are."

　　The real test, however, will be if doctors can then figure out what to do next.

　　"It’s never encouraging to say to a patient that she’s going to do poorly because of her genes," Piccart said. "We need to be able to offer patients an effective treatment."

　　Piccart and colleagues have been working to confirm the genetic sequences for women susceptible to breast cancer.

　　Tailori...

　　　【Introduction】

　　输送血液可以称为生命的礼物。然而，从每年5百万输血病人的大部分情况来看，实际上，输血弊大于利。

　　　　【Section One】Article

　　Why Banked Blood Goes Bad

　　It‘s a problem that doctors have been wrestling with for several years, as study after study shows a disturbing spike in heart disease and death in patients receiving transfusions. The trend affects almost every group of critically ill patients — from trauma sufferers in the ER to heart attack victims, patients with anemia and those undergoing chemotherapy. This increase in death and heart disease, doctors say, is unrelated to infectious blood-borne diseases or allergic reactions that often follow transfusions. "After you control for sickness and all sorts of things, patients who receive transfusions still have more heart attacks. It makes no sense," says Dr. Jonathan Stamler, a professor of medicine at Duke University Medical Center.

　　Logically, and medically, patients who need transfusions — those with low blood counts — should benefit immediately from a transfusion of new oxygen-laden red blood cells. Yet many get sicker. Puzzled by the paradox, Stamler and his colleagues decided to look more closely at banked blood — to figure out whether it underwent certain changes that turned it from life-saving in the donor to potentially deadly in the bag.

　　Their finding, reported this week in the Proceedings of the National Academy of Sciences: nitric oxid...

　　　【Introduction】

　　根据一份今在「英国医学杂志」刊出的报告指出，母乳虽然含有丰富营养，但长期吃母奶无助於降低幼儿罹患气喘和过敏症状风险。

　　【Section One】Article

　　The benefits of breast-feeding are many and varied. Studies suggest that breast-fed kids are smarter, taller, thinner, healthier and less stressed than babies on bottles. Plus, breast-feeding helps moms bond with their babies and may even lower their blood pressure. So, is there anything breast milk can‘t do? Apparently, yes, according to a new study published Tuesday by BMJ Online: It doesn‘t offer infants much defense against asthma or allergies.

　　That‘s a question researchers have long debated. Until now, the evidence has been mixed: Some studies have suggested that exclusive, prolonged breast-feeding helps stave off asthma and allergies later in life; other studies have shown no protection, or even an increased risk. But most of the available data has come from observational studies. The new BMJ paper, in contrast, was a large, long-term randomized trial that involved more than 17,000 breast-feeding women and babies, 13,889 of whom were tracked until age 6 1/2. Researchers recruited the moms in maternity hospitals and clinics in Belarus. About half of them — those who had already begun breast-feeding — were encouraged to continue breast-feeding exclusively; the control group got no such extra urging.

　　Researchers report that women in the intervention group brea...

　　　10 Questions for 50 Cent

　　　　Introduction专辑介绍

　　这张不得了，真的了不起。阿姆、玛丽布莱姬、阿肯、贾斯汀、提姆巴兰、小野猫主唱妮可、黑眼豆豆主脑will.i.am等一起跪拜屌到爆

　　嘻哈帝王相，有数字为证。全球累积销售逼近2500万张，17张白金唱片销售认证、13座Billboard音乐奖、5座世界音乐奖、3座MTV音乐录像带大奖与3座全美音乐奖肯定

　　四首超强音乐录像带全球媒体同步曝光 五角帝国版图开始勾勒

　　　Vocabulary

　　debuted n.v.初次登场, 开张

　　metaphor n.[修辞]隐喻, 暗喻, 比喻说话

　　uproar n. 喧嚣, 骚动

　　bulletproof adj.防弹的

　　slangn.俚语, 行话 v.用粗话骂, 用俚语说

　　fragment n.碎片, 断片, 片段

　　endorse v.在(票据)背面签名, 签注(文件), 认可, 签署

　　单词都很简单。。速读

　　He was born Curtis Jackson, but he made his mark on the rap world performing under his childhood nickname. His third album, Curtis, debuted Sept. 11. 50 Cent will now take your questions

　　Is it Curtis or 50 Cent? —Maggie Shaw, New York City It’s 50, but the album title is Curtis. It made perfect sense for me to title it Curtis, considering my grandfather is Curtis Sr., his firstborn is Curtis Jr. and I’m his first grandchild, so my mom named me after him. I’m Curtis III, and this is my third album. 50 Cent was a name that kind of stuck. For me, it was a metaphor for change. That’s what made me utilize it when I actually started rapping.

　　What should we expect from your new album? —Ignacio Meza, Los Angeles

　　You should expect a lot of surprises. For my last two albums, I isolated myself to working with only members ...